Hi! Thanks for this great TUI tool. 🐹

Why this change?
While the interfaces command provides a great human-readable output, it is currently difficult to parse for automation scripts, SIEM integrations, or other tools.

What works:
I added a --json flag to the interfaces command.

• Users can now run packemon interfaces --json to get a structured JSON output.
• The default behavior (table view) remains unchanged if the flag is not used.

Example Usage:

$ packemon interfaces --json
[
  {
    "InterfaceName": "eth0",
    "MacAddr": "00:15:5d:...",
    ...
  }
]